Most people find it difficult to believe that 70% of the Power Cord effects are MECHANICAL NOT ELECTRICAL! You might ask why?

The power that comes via Romex through the walls can have a deformed sine wave, severe over/under voltage and mixed with noise (EMI/RFI). Deformed sine waves can only be corrected with premium (over $600) Power Conditioners such as high grade Panamax, PS, Exact Power, Richard Gray …

Better power conditioner/ protectors - $300- $600 can regulate voltage – but many components have regulated power supplies – so this doesn’t have a dramatic effect.
Eliminating Noise is handled well but not perfectly by most $100-$300 units

MECHANICAL: Low Frequency vibrations (60-240 HZ harmonics) cause noise in the power supplies of many components. The supply can be poorly seated and even with perfect power - create mechanical resonances.

ELECTRICAL– you can get leakages, magnetic field effects and induced noise based upon how well the power supply is shielded and physically coupled to the chassis. Overall shielding and grounding of the component is quite important.

Do power cords make audible / visible differences on most components? YES
Do tires with the same speed rating make differences on high performance cars – YES
Would you choose the same tire for a light sports car vs. a big sedan –NO
Is their one Power Cable design that will work great on all equipment – NO